[golfbulldog]

. . . there by making hinge action "obsolete". Therein lies the "controversy" of the people who want to rip Mr. Kelley's science.

Bucket, thanks for the links but be sure that this thread was for discussion of how we to explain why the ball behaves differently when we use different hinges...is it real or just d-plane with a "seems as if"....it is not intended to rip Homer's work...but equally we should not fear reaching a conclusion that differs from HK.

PLEASE DO NOT EQUATE "D-PLANE" WITH ANY OTHER TGM QUALIFIED INSTRUCTORS WORK (see, not just Ben Hogan and Homer who can use caps for effect!). It is Dr. T's phrase as far as i am aware...

For those who state that Hinge action is just altering the clubface at impact...hence d-plane alignments at impact... does anyone have proof that the clubface behaves differently PRE-IMPACT for horizontal hinge versus vertical hinge which we obviously feel as though they occur through impact??

ie. "the club is preparing pre-impact to get to a different destination post impact" ...as clubhead travel differs post impact for horizontal and vertical hinge actions.

AGAIN, I stress keep this is meant to be a non-patronising / non-confrontational discussion...Thanks - keep your thoughts coming.